[LU-10283] changelog entries for creates in striped directories use stripe FID as pfid

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Nikitas Angelinas
• Reporter: John Hammond

Description

When we create files in striped directories the changelog entries emitted use the parent stripe FID (instead of the parent dir FID) as the pfid for the create:

m:lustre# lfs mkdir -c2 d0
m:lustre# lfs path2fid d0
[0x200000402:0xf9f:0x0]
m:lustre# lfs getdirstripe d0
lmv_stripe_count: 2 lmv_stripe_offset: 0 lmv_hash_type: fnv_1a_64
mdtidx         FID[seq:oid:ver]
     0         [0x200000400:0x3d3:0x0]        
     1         [0x240000401:0x3d3:0x0]        
m:lustre# touch d0/f{0,1}
m:lustre# lfs changelog lustre-MDT0000
10753 02MKDIR 14:19:40.273195957 2017.11.27 0x0 t=[0x200000402:0xf9f:0x0] j=lfs.0 p=[0x200000007:0x1:0x0] d0
10754 01CREAT 14:20:08.243388795 2017.11.27 0x0 t=[0x200000402:0xfa0:0x0] j=touch.0 p=[0x200000400:0x3d3:0x0] f1
10755 11CLOSE 14:20:08.245569226 2017.11.27 0x42 t=[0x200000402:0xfa0:0x0] j=touch.0
m:lustre# lfs changelog lustre-MDT0001
11883 01CREAT 14:20:08.240982376 2017.11.27 0x0 t=[0x240000402:0x111f:0x0] j=touch.0 p=[0x240000401:0x3d3:0x0] f0
11884 11CLOSE 14:20:08.242496774 2017.11.27 0x42 t=[0x240000402:0x111f:0x0] j=touch.0

This confuses lustre_rsync. I wonder if we should fix this.

Issue Links

• is related to: LU-10265 lustre_rsync DNE support
• is related to: LU-12574 Replicating lustre's metadata only with changelog records + DNEv2